Rufous-fronted Greenlet

The rufous-fronted greenlet (Tunchiornis ferrugineifrons) is a passerine bird in the family Vireonidae, the vireos. It is found in South America from Guyana and Brazil west of the Rio Negro north into Venezuela, east into southeast Colombia and south through Ecuador, Peru and Bolivia. It was split from the ochre-crowned greenlet in 2025 by the IOC and Clements Checklist. Owing to its recent separation as a species, virtually nothing distinctive is known about its natural history.

Taxonomy: The rufous-fronted greenlet was formally described in 1862 as Hylophilus ferrugineifrons by the English zoologist Philip Sclater from a holotype collected in Bogota, Colombia. It was subsequently considered to be a subspecies of tawny-crowned greenlet (now called ochre-crowned greenlet).

Two subspecies are recognised:

• T. f. ferrugineifrons (Sclater, PL, 1862) – southeastern Colombia eastward to southern Venezuela, far western Guyana, and northwestern Brazil (west of the Río Negro), southward to northeastern Peru and western Amazonian Brazil south of the Amazon River, eastward to the west bank of the Río Madeira
• T. f. viridior (Todd, WEC, 1929) – eastern Peru (south of the Marañón River and Amazon River) southward to northern Bolivia